1864.] 317 



apical segments sometimes tinged with yellowish. Length <i — oi lines; 

 expanse of wings 6 — G-i lines. 



Ildb. — Illinois. Dr. Samuel Lewis. 



This species may not belong to this geniis on account of the areolet 

 of the superior wings being incomplete. 



Genus RHYSSA, Grav. 

 1. Rhyssa Nortoni, n. sp. 



Black, varied with ferruginous and spotted with yellow; antennae black; legs 

 mostly yellow; wings subhyaline. 



Femalr. — Head black ; the cheeks and broad frontal orbits, bright 

 yellow, the latter emarginate on each side of the insertion of the anten- 

 nae ; mandibles black, shining ; palpi testaceous; antennae more than 

 half the length of the body, black, apical joint tinged with rufous. 

 Thorax sculptured like that of R. lunator Fjibr., black; the mesotho- 

 rax dull rufous, with the incisures and a line down the middle, blackish ; 

 on each side of the collar a large, concave, smooth, polished space, mar- 

 gined above with dull rufous and posteriorly with black ; an oval ele- 

 vated spot on each side beneath the insertion of the anterior wings, the 

 scutellum and postscutellum, bright yellow ; metathorax smooth and 

 shining, pale ferruginous above, with the extreme posterior margin and 

 two large spots on each side, bright yellow; tegulae pale. Wings hya- 

 line, tinged with yellowish, and having a violet reflection in certain 

 lights; stigma dull rufous, nervures black; areolet shaped like that of 

 lunator, and connects at its apex with the second recurrent nervure. 

 Legs bright yellow, varied with honey-yellow; coxae black, the anterior 

 pair brown-black with a small yellowish spot in front; middle and pos- 

 terior femora obfuscated, their tips bright yellow, their tibiae honey- 

 yellow ; tarsal claws blackish at tips. Abdomen brown above, the 

 basal segment pale ferruginous ; on each side of the 2nd and following 

 segments, anteriorly, a rather large ferruginous stain, which becomes 

 confluent on the disk of the 2nd and 3rd segments; a semicircular spot 

 on the apex of the 1st and 2nd segments, a large rounded spot on each 

 side of the three following segments, and a transverse spot on each side 

 of the two apical segments, all bright yellow; ventral segments yellow- 

 ish-ferruginous, their apical margins bright yellow ; ovipositor nearly 

 twice the length of the body, brown-black, polished, valves brown-black. 



